Scissor lock



FIG. 1 is a perspective view of a scissor lock showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an enlarged left side elevational view thereof; and,

FIG. 6 is an enlarged right side elevational view thereof.

The broken lines illustrate environment and forms no part of the claimed design. 

CLAIM The ornamental design for a scissor lock, as shown and described. 